/*******************************************************************************
  Snes9x - Portable Super Nintendo Entertainment System (TM) emulator.
 
  (c) Copyright 1996 - 2003 Gary Henderson (gary.henderson@ntlworld.com) and
                            Jerremy Koot (jkoot@snes9x.com)

  (c) Copyright 2002 - 2003 Matthew Kendora and
                            Brad Jorsch (anomie@users.sourceforge.net)
 

                      
  C4 x86 assembler and some C emulation code
  (c) Copyright 2000 - 2003 zsKnight (zsknight@zsnes.com),
                            _Demo_ (_demo_@zsnes.com), and
                            Nach (n-a-c-h@users.sourceforge.net)
                                          
  C4 C++ code
  (c) Copyright 2003 Brad Jorsch

  DSP-1 emulator code
  (c) Copyright 1998 - 2003 Ivar (ivar@snes9x.com), _Demo_, Gary Henderson,
                            John Weidman (jweidman@slip.net),
                            neviksti (neviksti@hotmail.com), and
                            Kris Bleakley (stinkfish@bigpond.com)
 
  DSP-2 emulator code
  (c) Copyright 2003 Kris Bleakley, John Weidman, neviksti, Matthew Kendora, and
                     Lord Nightmare (lord_nightmare@users.sourceforge.net

  OBC1 emulator code
  (c) Copyright 2001 - 2003 zsKnight, pagefault (pagefault@zsnes.com)
  Ported from x86 assembler to C by sanmaiwashi

  SPC7110 and RTC C++ emulator code
  (c) Copyright 2002 Matthew Kendora with research by
                     zsKnight, John Weidman, and Dark Force

  S-RTC C emulator code
  (c) Copyright 2001 John Weidman
  
  Super FX x86 assembler emulator code 
  (c) Copyright 1998 - 2003 zsKnight, _Demo_, and pagefault 

  Super FX C emulator code 
  (c) Copyright 1997 - 1999 Ivar and Gary Henderson.



 
  Specific ports contains the works of other authors. See headers in
  individual files.
 
  Snes9x homepage: http://www.snes9x.com
 
  Permission to use, copy, modify and distribute Snes9x in both binary and
  source form, for non-commercial purposes, is hereby granted without fee,
  providing that this license information and copyright notice appear with
  all copies and any derived work.
 
  This software is provided 'as-is', without any express or implied
  warranty. In no event shall the authors be held liable for any damages
  arising from the use of this software.
 
  Snes9x is freeware for PERSONAL USE only. Commercial users should
  seek permission of the copyright holders first. Commercial use includes
  charging money for Snes9x or software derived from Snes9x.
 
  The copyright holders request that bug fixes and improvements to the code
  should be forwarded to them so everyone can benefit from the modifications
  in future versions.
 
  Super NES and Super Nintendo Entertainment System are trademarks of
  Nintendo Co., Limited and its subsidiary companies.
*******************************************************************************/

#include "snes9x.h"
#include "memmap.h"
#include "ppu.h"
#include "dsp1.h"
#include "missing.h"
#include "cpuexec.h"
#include "debug.h"
#include "apu.h"
#include "dma.h"
#include "fxemu.h"
#include "gfx.h"
#include "soundux.h"
#include "cheats.h"
#include "sa1.h"
#include "netplay.h"
#include "spc7110.h"

START_EXTERN_C
char String[513];

struct Missing missing;

struct SICPU ICPU;

struct SCPUState CPU;

struct SRegisters Registers;

struct SAPU APU;

struct SIAPU IAPU;

struct SAPURegisters APURegisters;

struct SSettings Settings;

struct SDSP1 DSP1;

struct SSA1Registers SA1Registers;

struct SSA1 SA1;

SSoundData SoundData;

uint8 *SRAM = NULL;
uint8 *ROM = NULL;
uint8 *RegRAM = NULL;
uint8 *C4RAM = NULL;

long OpAddress = 0;

CMemory Memory __attribute__ ((aligned (32)));

struct SSNESGameFixes SNESGameFixes;

uint8 A1 = 0, A2 = 0, A3 = 0, A4 = 0, W1 = 0, W2 = 0, W3 = 0, W4 = 0;
uint8 Ans8 = 0;
uint16 Ans16 = 0;
uint32 Ans32 = 0;
uint8 Work8 = 0;
uint16 Work16 = 0;
uint32 Work32 = 0;
signed char Int8 = 0;
short Int16 = 0;
long Int32 = 0;
unsigned char OpenBus = 0;


END_EXTERN_C



#ifndef ZSNES_FX
struct FxInit_s SuperFX;
#else
START_EXTERN_C
uint8 *SFXPlotTable = NULL;
END_EXTERN_C
#endif

struct SPPU PPU __attribute__ ((aligned (32)));
struct InternalPPU IPPU __attribute__ ((aligned (32)));

struct SDMA DMA[8] __attribute__ ((aligned (32)));

uint8 *HDMAMemPointers [8];
uint8 *HDMABasePointers [8];

struct SBG BG __attribute__ ((aligned (32)));

struct SGFX GFX __attribute__ ((aligned (32)));
struct SLineData LineData[240] __attribute__ ((aligned (32)));
struct SLineMatrixData LineMatrixData [240] __attribute__ ((aligned (32)));

uint8 Mode7Depths [2];
NormalTileRenderer DrawTilePtr = NULL;
ClippedTileRenderer DrawClippedTilePtr = NULL;
NormalTileRenderer DrawHiResTilePtr = NULL;
ClippedTileRenderer DrawHiResClippedTilePtr = NULL;
LargePixelRenderer DrawLargePixelPtr = NULL;

uint32 odd_high[4][16];
uint32 odd_low[4][16];
uint32 even_high[4][16];
uint32 even_low[4][16];

#ifdef GFX_MULTI_FORMAT

uint32 RED_LOW_BIT_MASK = RED_LOW_BIT_MASK_RGB565;
uint32 GREEN_LOW_BIT_MASK = GREEN_LOW_BIT_MASK_RGB565;
uint32 BLUE_LOW_BIT_MASK = BLUE_LOW_BIT_MASK_RGB565;
uint32 RED_HI_BIT_MASK = RED_HI_BIT_MASK_RGB565;
uint32 GREEN_HI_BIT_MASK = GREEN_HI_BIT_MASK_RGB565;
uint32 BLUE_HI_BIT_MASK = BLUE_HI_BIT_MASK_RGB565;
uint32 MAX_RED = MAX_RED_RGB565;
uint32 MAX_GREEN = MAX_GREEN_RGB565;
uint32 MAX_BLUE = MAX_BLUE_RGB565;
uint32 SPARE_RGB_BIT_MASK = SPARE_RGB_BIT_MASK_RGB565;
uint32 GREEN_HI_BIT = (MAX_GREEN_RGB565 + 1) >> 1;
uint32 RGB_LOW_BITS_MASK = (RED_LOW_BIT_MASK_RGB565 | 
			    GREEN_LOW_BIT_MASK_RGB565 |
			    BLUE_LOW_BIT_MASK_RGB565);
uint32 RGB_HI_BITS_MASK = (RED_HI_BIT_MASK_RGB565 |
			   GREEN_HI_BIT_MASK_RGB565 |
			   BLUE_HI_BIT_MASK_RGB565);
uint32 RGB_HI_BITS_MASKx2 = (RED_HI_BIT_MASK_RGB565 |
			     GREEN_HI_BIT_MASK_RGB565 |
			     BLUE_HI_BIT_MASK_RGB565) << 1;
uint32 RGB_REMOVE_LOW_BITS_MASK = ~RGB_LOW_BITS_MASK;
uint32 FIRST_COLOR_MASK = FIRST_COLOR_MASK_RGB565;
uint32 SECOND_COLOR_MASK = SECOND_COLOR_MASK_RGB565;
uint32 THIRD_COLOR_MASK = THIRD_COLOR_MASK_RGB565;
uint32 ALPHA_BITS_MASK = ALPHA_BITS_MASK_RGB565;
uint32 FIRST_THIRD_COLOR_MASK = 0;
uint32 TWO_LOW_BITS_MASK = 0;
uint32 HIGH_BITS_SHIFTED_TWO_MASK = 0;

uint32 current_graphic_format = RGB565;
#endif

uint8 GetBank = 0;
struct SCheatData Cheat;

volatile SoundStatus so;

int Echo [24000] __attribute__ ((aligned (32)));
int DummyEchoBuffer [SOUND_BUFFER_SIZE] __attribute__ ((aligned (32)));
int MixBuffer [SOUND_BUFFER_SIZE] __attribute__ ((aligned (32)));
int EchoBuffer [SOUND_BUFFER_SIZE] __attribute__ ((aligned (32)));
int FilterTaps [8] __attribute__ ((aligned (32)));
unsigned long Z = 0;
int Loop [16];

uint16 SignExtend [2] = {
    0x00, 0xff00
};

//modified per anomie Mode 5 findings
int HDMA_ModeByteCounts [8] = {
    1, 2, 2, 4, 4, 4, 2, 4
};

uint8 BitShifts[8][4] =
{
    {2, 2, 2, 2},	// 0
    {4, 4, 2, 0},	// 1
    {4, 4, 0, 0},	// 2
    {8, 4, 0, 0},	// 3
    {8, 2, 0, 0},	// 4
    {4, 2, 0, 0},	// 5
    {4, 0, 0, 0},	// 6
    {8, 0, 0, 0}	// 7
};
uint8 TileShifts[8][4] =
{
    {4, 4, 4, 4},	// 0
    {5, 5, 4, 0},	// 1
    {5, 5, 0, 0},	// 2
    {6, 5, 0, 0},	// 3
    {6, 4, 0, 0},	// 4
    {5, 4, 0, 0},	// 5
    {5, 0, 0, 0},	// 6
    {6, 0, 0, 0}	// 7
};
uint8 PaletteShifts[8][4] =
{
    {2, 2, 2, 2},	// 0
    {4, 4, 2, 0},	// 1
    {4, 4, 0, 0},	// 2
    {0, 4, 0, 0},	// 3
    {0, 2, 0, 0},	// 4
    {4, 2, 0, 0},	// 5
    {4, 0, 0, 0},	// 6
    {0, 0, 0, 0}	// 7
};
uint8 PaletteMasks[8][4] =
{
    {7, 7, 7, 7},	// 0
    {7, 7, 7, 0},	// 1
    {7, 7, 0, 0},	// 2
    {0, 7, 0, 0},	// 3
    {0, 7, 0, 0},	// 4
    {7, 7, 0, 0},	// 5
    {7, 0, 0, 0},	// 6
    {0, 0, 0, 0}	// 7
};
uint8 Depths[8][4] =
{
    {TILE_2BIT, TILE_2BIT, TILE_2BIT, TILE_2BIT}, // 0
    {TILE_4BIT, TILE_4BIT, TILE_2BIT, 0},         // 1
    {TILE_4BIT, TILE_4BIT, 0, 0},                 // 2
    {TILE_8BIT, TILE_4BIT, 0, 0},                 // 3
    {TILE_8BIT, TILE_2BIT, 0, 0},                 // 4
    {TILE_4BIT, TILE_2BIT, 0, 0},                 // 5
    {TILE_8BIT, 0, 0, 0},                         // 6
    {0, 0, 0, 0}                                  // 7
};
uint8 BGSizes [2] = {
    8, 16
};
uint16 DirectColourMaps [8][256];

long FilterValues[4][2] =
{
    {0, 0},
    {240, 0},
    {488, -240},
    {460, -208}
};

int NoiseFreq [32] = {
    0, 16, 21, 25, 31, 42, 50, 63, 84, 100, 125, 167, 200, 250, 333,
    400, 500, 667, 800, 1000, 1300, 1600, 2000, 2700, 3200, 4000,
    5300, 6400, 8000, 10700, 16000, 32000
};

uint32 HeadMask [4] = {
#ifdef LSB_FIRST
    0xffffffff, 0xffffff00, 0xffff0000, 0xff000000
#else
    0xffffffff, 0x00ffffff, 0x0000ffff, 0x000000ff
#endif
};

uint32 TailMask [5] = {
#ifdef LSB_FIRST
    0x00000000, 0x000000ff, 0x0000ffff, 0x00ffffff, 0xffffffff
#else
    0x00000000, 0xff000000, 0xffff0000, 0xffffff00, 0xffffffff
#endif
};

START_EXTERN_C
uint8 APUROM [64] =
{
    0xCD,0xEF,0xBD,0xE8,0x00,0xC6,0x1D,0xD0,0xFC,0x8F,0xAA,0xF4,0x8F,
    0xBB,0xF5,0x78,0xCC,0xF4,0xD0,0xFB,0x2F,0x19,0xEB,0xF4,0xD0,0xFC,
    0x7E,0xF4,0xD0,0x0B,0xE4,0xF5,0xCB,0xF4,0xD7,0x00,0xFC,0xD0,0xF3,
    0xAB,0x01,0x10,0xEF,0x7E,0xF4,0x10,0xEB,0xBA,0xF6,0xDA,0x00,0xBA,
    0xF4,0xC4,0xF4,0xDD,0x5D,0xD0,0xDB,0x1F,0x00,0x00,0xC0,0xFF
};

#ifdef NETPLAY_SUPPORT
struct SNetPlay NetPlay;
#endif

// Raw SPC700 instruction cycle lengths
int32 S9xAPUCycleLengths [256] = 
{
    /*        0, 1, 2, 3, 4, 5, 6, 7, 8, 9, a, b, c, d, e, f, */
    /* 00 */  2, 8, 4, 5, 3, 4, 3, 6, 2, 6, 5, 4, 5, 4, 6, 8, 
    /* 10 */  2, 8, 4, 5, 4, 5, 5, 6, 5, 5, 6, 5, 2, 2, 4, 6, 
    /* 20 */  2, 8, 4, 5, 3, 4, 3, 6, 2, 6, 5, 4, 5, 4, 5, 4, 
    /* 30 */  2, 8, 4, 5, 4, 5, 5, 6, 5, 5, 6, 5, 2, 2, 3, 8, 
    /* 40 */  2, 8, 4, 5, 3, 4, 3, 6, 2, 6, 4, 4, 5, 4, 6, 6, 
    /* 50 */  2, 8, 4, 5, 4, 5, 5, 6, 5, 5, 4, 5, 2, 2, 4, 3, 
    /* 60 */  2, 8, 4, 5, 3, 4, 3, 6, 2, 6, 4, 4, 5, 4, 5, 5, 
    /* 70 */  2, 8, 4, 5, 4, 5, 5, 6, 5, 5, 5, 5, 2, 2, 3, 6, 
    /* 80 */  2, 8, 4, 5, 3, 4, 3, 6, 2, 6, 5, 4, 5, 2, 4, 5, 
    /* 90 */  2, 8, 4, 5, 4, 5, 5, 6, 5, 5, 5, 5, 2, 2,12, 5, 
    /* a0 */  3, 8, 4, 5, 3, 4, 3, 6, 2, 6, 4, 4, 5, 2, 4, 4, 
    /* b0 */  2, 8, 4, 5, 4, 5, 5, 6, 5, 5, 5, 5, 2, 2, 3, 4, 
    /* c0 */  3, 8, 4, 5, 4, 5, 4, 7, 2, 5, 6, 4, 5, 2, 4, 9, 
    /* d0 */  2, 8, 4, 5, 5, 6, 6, 7, 4, 5, 4, 5, 2, 2, 6, 3, 
    /* e0 */  2, 8, 4, 5, 3, 4, 3, 6, 2, 4, 5, 3, 4, 3, 4, 3, 
    /* f0 */  2, 8, 4, 5, 4, 5, 5, 6, 3, 4, 5, 4, 2, 2, 4, 3
};

// Actual data used by CPU emulation, will be scaled by APUReset routine
// to be relative to the 65c816 instruction lengths.
int32 S9xAPUCycles [256] =
{
    /*        0, 1, 2, 3, 4, 5, 6, 7, 8, 9, a, b, c, d, e, f, */
    /* 00 */  2, 8, 4, 5, 3, 4, 3, 6, 2, 6, 5, 4, 5, 4, 6, 8, 
    /* 10 */  2, 8, 4, 5, 4, 5, 5, 6, 5, 5, 6, 5, 2, 2, 4, 6, 
    /* 20 */  2, 8, 4, 5, 3, 4, 3, 6, 2, 6, 5, 4, 5, 4, 5, 4, 
    /* 30 */  2, 8, 4, 5, 4, 5, 5, 6, 5, 5, 6, 5, 2, 2, 3, 8, 
    /* 40 */  2, 8, 4, 5, 3, 4, 3, 6, 2, 6, 4, 4, 5, 4, 6, 6, 
    /* 50 */  2, 8, 4, 5, 4, 5, 5, 6, 5, 5, 4, 5, 2, 2, 4, 3, 
    /* 60 */  2, 8, 4, 5, 3, 4, 3, 6, 2, 6, 4, 4, 5, 4, 5, 5, 
    /* 70 */  2, 8, 4, 5, 4, 5, 5, 6, 5, 5, 5, 5, 2, 2, 3, 6, 
    /* 80 */  2, 8, 4, 5, 3, 4, 3, 6, 2, 6, 5, 4, 5, 2, 4, 5, 
    /* 90 */  2, 8, 4, 5, 4, 5, 5, 6, 5, 5, 5, 5, 2, 2,12, 5, 
    /* a0 */  3, 8, 4, 5, 3, 4, 3, 6, 2, 6, 4, 4, 5, 2, 4, 4, 
    /* b0 */  2, 8, 4, 5, 4, 5, 5, 6, 5, 5, 5, 5, 2, 2, 3, 4, 
    /* c0 */  3, 8, 4, 5, 4, 5, 4, 7, 2, 5, 6, 4, 5, 2, 4, 9, 
    /* d0 */  2, 8, 4, 5, 5, 6, 6, 7, 4, 5, 4, 5, 2, 2, 6, 3, 
    /* e0 */  2, 8, 4, 5, 3, 4, 3, 6, 2, 4, 5, 3, 4, 3, 4, 3, 
    /* f0 */  2, 8, 4, 5, 4, 5, 5, 6, 3, 4, 5, 4, 2, 2, 4, 3
};

END_EXTERN_C
